Exit light bulb



FIG. 1 is a perspective side view of the exit light bulb of the present invention, with the broken line showing for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a plan view of the exit light bulb of FIG. 1;

FIG. 3 is a side view of the exit light bulb of FIG. 1;

FIG. 4 is an end view showing the screw shell end of the exit light bulb of FIG. 1, as seen from the top of FIG. 1; and,

FIG. 5 is an end view of the exit light bulb of FIG. 1, as seen from the bottom of FIG. 1. 

The ornamental design for an exit light bulb, as shown and described. 